Compatibility of MSM and Vitamin C in Formulations

Regarding the use of MSM (Methylsulfonylmethane) and Vitamin C in the same cosmetic formulation, there is information suggesting potential compatibility issues, particularly with less stable forms of Vitamin C like L-Ascorbic Acid.

• The description for Pure MSM™ indicates that it is generally not suitable for use with Vitamin C in the same formula because it may accelerate the oxidation of Vitamin C, leading to faster degradation.

However, as you've observed with many current products, some formulations successfully combine MSM with more stable Vitamin C derivatives, such as Sodium Ascorbyl Phosphate (SAP). SAP is known for its higher stability compared to L-Ascorbic Acid. While a general caution exists, careful formulation techniques might allow for the inclusion of stable Vitamin C forms alongside MSM.

Recommended Concentration for MSM

If you choose to use Pure MSM™ in a formulation, the recommended usage rate is typically between 1% and 5%. A concentration of 3% is often suggested for oil control benefits, while up to 5% can be used for exfoliation. It is generally advised not to exceed a 5% concentration.

Packaging for Vitamin C Serums

The best packaging for a Vitamin C serum depends heavily on the specific type of Vitamin C used and the formulation.

• For less stable forms like L-Ascorbic Acid, packaging that minimizes exposure to air and light is crucial to prevent oxidation. An airless pump bottle is generally superior to a dropper bottle in this regard, as dropper bottles introduce air into the product each time they are opened. A thicker texture might also indicate a more stable formulation base (e.g., anhydrous) which can help protect L-Ascorbic Acid.
• For highly stable derivatives like Sodium Ascorbyl Phosphate (SAP) or Ascorbyl Glucoside, the packaging is less critical for stability, but an airless pump is still a good choice for maintaining product integrity and hygiene over time.